Breezy_Pete

Yes, there is one. Part number 045 907 660 D; located just behind the crank pulley. As I said, before, it only senses oil level and temperature. That info can be integrated with other recorded data about vehicle usage pattern so that the 'service required' or oil level warning messaging can be produced at an approximately useful time.

Tell me the VIN (17 character vehicle identification number) if you wish me to check for your vehicle. It will only detect level and temperature, but that is what is required.

The youtube videos made by ross-tech that Nige linked in his post above do a much better job of explaining everything than mere words or pictures can.

See if that ^ suddenly makes you go 'Ahhhhh!'; if not I can make a little video that may be clearer.

Try this page (for a mk1 Fabia, not an Octy) where there are four such rectangles. The 'current path' numbers go from 57 to 70 along the extreme bottom edge of this page (I've put a blue box around them to make them pop a bit more). Two of these rectangles, with numbers 59 and 68 inside them, are 'within page' mutual cross-references, used to avoid the need to have wires crossing over one another, in order to demonstrate the connection which I have added manually in green. The other two go to the previous page in the section, where the two fuses I've mentioned in red font/arrows are to be found.

The 206, 207 and 210 can be found along the bottom (not in rectangles) of the last page of the diagram for that engine, page 8/16. You "look upward" from each of these to find another rectangle with a different number in, which is the 'back reference' taking you to the points on page 8/14 from which you came. Specifically path numbers 178, 179 and 181, as seen along the bottom of that previous page. In this case it's slightly complicated by the fact that there are two rectangles with different numbers in them on path 206, one going to path 61 (page 8/6, the one you found), the other to path 181 (the one you came from). For each section/chapter, the 'current path' numbers along the bottom of each page serve as an index, a subdivision of each page. This allows the point to point cross-referencing of these numbers in rectangles. Thanks for posting @Taylor93, I must admit that the 'explanations' pdf doesn't do a great job of explaining this feature. I thought it was better. I will look out an easier to follow example where the references go to points on the same page, making it easier to describe.

Cabin fuse #40, 7.5 Amp rated, looks to be worth checking, judging by the first diagram I've looked at.

Actually, not sure where I got the impression only one headlight is involved. Did I read that somewhere above or just imagine it?

Does the other headlight adjust its aim in response to the control? I guess it must or both would have been on the fail list. What is the actual failure number? (So I can find the relevant paragraph in the test manual). I can look at circuits if helpful, but would need reg number or VIN to be sure I get the right system variant.

The reason I ask is that there is a coolant thermostat for the gearbox in DSG equipped cars which is almost always found to be the cause of lower than ideal engine coolant temperature when it fails. Lots of threads about it in lots of the subforums.

I reported a couple of their first posts just thinking it was spam, but then noticed the pattern.

@J.R. you appear to have a weird stalker.

Is it a DSG gearbox?

Not sure I made myself very clear, but my reason for mentioning the wiring breaks in the door hinge vicinity was related to the non-functioning electric windows.

If you open up the BCM, you may see physical damage/ burning on that chip.

With the connector unplugged from BCM, measure resistance to earth from the pin 16 wire. It should be quite a small resistance, because all three indicator bulbs on the left side are in parallel from it to earth, and the front and rear bulbs are 21 Watt, so their cold resistance will be a very small number. If you measure a high resistance instead, it could suggest a wire breakage/damage/corrosion from pin 16 towards the bulbs (black/white) wire.

Pin 15 of that connector, a red/white wire is the power from fuse 49. But it also supplies the right side indicators, so if they work, the power feed into the BCM must be OK.

Yes, pin 16 should alternate between 0V and 12V if the chip is working the left indicators. Fuse 49 carries current into the chip on pin 15 of that connector (or maybe 13, I forget), the MOSFET transistors in the chip should send it back out when indication is commanded.

Wideband sensors are not easy to test, I believe. Try replacement. Do you want a part number?

What problem are you actually trying to solve?

Lower arm balljoint part numbers for your VIN are 1K0407365C for the left, and 1K0407366C for the right side. Parts catalogue doesn't give a dimension for the taper.

Between the heater pins is probably a few Ohms, but may vary with temperature so try with cold system. I don't think any other meaningful measurement can be done on the sensor part.

The wiring info for electromechanical power steering from July 2018 onwards shows only one fuse, an 80 Amp under-bonnet one - SA3. If that had failed you would have zero steering assistance.

There's probably a way to test the injector loom for major problems from the connector on the end of the head. Resistance measurement between pairs of pin contacts. Haven't looked into this, but I bet there's info out there.